An online lb (pound) and Kg (Kilogram) converter is presented. Problems involving conversions between pounds and Kg are also included.
In what follows a pound is abbreviated as "lb" and a kilogram as "Kg".

Conversion Formula of Pound into Kg [1]

1 lb = 0.45359237 Kg
1 Kg = (1/0.45359237) lb = 2.20462262185 lb

Examples of Conversion

Example 1 - Convert 12.5 lb into Kg and round answer to 1 decimal place.
12.5 lb = 12.5 × 0.45359237 Kg = 5.669904625 Kg
Round to 1 decimal place
12.5 lb = 5.7 Kg

Example 2 - Convert 1.56 kg into lb and round answer to 1 decimal place.
1.56 kg = 1.56 × 2.20462262185 lb = 3.43921129009 lb
Round to 1 decimal place
1.56 kg = 3.4 lb

Use of lb and kg Conversion Calculators

Enter the number of pounds (lb) or kilograms (kg) to be converted and convert.

Problems Involving lb and Kg Conversions

Problem 1
A cow consumes 2% of its body weight daily. How many days will 10,000 Kg of cow feed last for a cow whose weight is 1600 lb? Round your answer to the nearest whole number.

Solution
Let W be 2% of the body weight of the cow. Hence
W = 2% × 1600 lb = 32 lb
Convert the cow feed available to lb
10,000 Kg = 10,000 × 2.20462262185 lb = 22046.2262185 lb
The number N of days that 22046.2262185 lb will feed a cow that consumes 32 lb daily is given by
N = ( 22046.2262185 lb ) / ( 32 lb) = 688.944569328 days.
Round the answer to the nearest whole number of days
N = 689 days

Problem 2
A restaurant uses 5 Kg of potatoes and 2 Kg of carrots every day. The potatoes are sold in bags of 5 lb and the carrots are sold in bags of 0.5 lb. A bag of potatoes costs $7 and a bag of carrots cost $3.
How much does this restaurant spend on potatoes and carrots in 30 days?

Solution
In 30 days
30 × 5 Kg = 150 Kg of potatoes are used
Convert 150 Kg into pounds
150 Kg = 150 × 2.20462262185 lb = 330.693393277 lb
Number N1 of bags of potatoes corresponding to 330.693393277 lb is given by
N1 = ( 330.693393277 lb ) / ( 5 lb) = 66.1386786554
Round to the nearest higher whole number
N1 = 67 bags of potatoes

In 30 days
30 × 2 Kg = 60 Kg of carrots are used
Convert 60 Kg into pounds
60 Kg = 60 × 2.20462262185 lb = 132.277357311 lb
Number N2 of bags of carrots corresponding to 132.277357311 lb is given by
N2 = ( 132.277357311 lb )/( 0.5 lb ) = 264.554714622
Round to the nearest higher whole number
N2 = 265 bags of carrots
The cost C of the potatoes and carrots in 30 days is given by
C = N1 × $7 + N2 × $3 = 67 × $7 + 265 × $3 = $1264

Problem 3
One pound of boneless chicken costs $10. How much does a kilogram of boneless chicken cost?

Solution
We need to convert $10 / pound into $x/ kg. Find x
1 pound = 0.45359237 Kg
Substitute pound by 0.45359237 Kg and write the cost as
$10 / pound = $10 / 0.45359237 Kg
Divide 10 by 0.45359237 to obtain the price P per kg as
P = $22.0462262185 / kg
to the nearest cent, the price of boneless chicken is
P = $22.05 / kg

More References and links

1. www.nist.gove.pdf
2. Units Conversion and Calculators
3. Math Calculators and Solvers.